Valve.



No. 332,394. PATENTBD OCT. 2, 1906.

J. L. LATTA L J. A. MARTIN.

VALVE.

rPLxoA'uoN funn Aue. 5. 1905.

4 figg:

i; l Witnesses A; t a@ l-nv'entons by f f Aft'rneys PATEAITED 00T. 2, 190s. J. L. LATTA A J. A. MARTIN.

VALVE.

APPLIUATION FILED Aue.s.1oos.

invento( Witnesses VW f.;

Attorneys eral arrangement of the elevator.

rATnNT OFFICE;

JOHN LEE LATTA AND JAMES ANDREW MARTIN,`()F HICKORY, NORTH CAROLINA.

VALVE.

Patented Oct. 2, 1906."

Application filed Allgu' 5,1905. Serial No. 272,921.

To `r11/ZZ whom it may concern,.-

Beit known that We, JoHN LEE LATTA and JAMES ANDREW MARTIN, citizens of the United States, residing at Hickory, in the county of Catawba and State of North Carolina, have invented a new and useful Valve, of which the following is a specification.

This invention relates to improvements in valves for compressed-air water-elevators of that general type in which air under pressure is forced alternately into a pair of cylinders or tanks for the purpose of expelling water therefrom.

The principal object of the invention is to provide a novel form of auxiliary-valve mechanism for controlling the position of the main valve, and, further, to provide a mechanism of compact and simple construction in which the several ports or passages may be formed at comparatively small ex ense.

With these and other `o jects in view, as

will more fully hereinafter a pear, the invention consists in certain nove features of construction and arran ement of parts hereinafter fully described, illustrated in the accompanying'drawings, and particularly pointed out in the appended claims, it being understood that various changes in the form, proportions, size, and minor details of the structure may be made Without departing from the spirit or sacrii'icing any of the advantages 2 of the invention.

In the accompanying drawings, Figure 1 is anelevation of a compressed-air water-elevator rovided with a valve constructed in accor ance with the invention, portions of the casing being brokenaway in order to more clearly illustrate theconstruction and gen- Fig. 2 is a vertical section through the valve-chamber onthe line 2 2 of Fig. 1, the view being on an enlarged scale. Fi 3 is a transverse section of the same on the Ime 3 3 of Fig. 2. Fig. 4 is a perspective diagram showing the arrangement of the various orts.

Similar numerals ci) reference arefemployed to indicate corresponding parts throughout the several iigures of the drawings,

The device forming the subject of the present invention is designed moreespecially for use in connection with Water-pumping or elevating devices where compressed air is employed to alternately displace the water from a pair of cylinders or tanks.

In the drawings thereis shown a compressed-air water-elevator, including a pair of' chambers 1 and 2, each provided with a water-inlet valve opening under the influence of external pressure and closing when the air is acting to force the water from the chamber. Both chambers are connected to a common discharge-pipe 4, leading to a point of delivery. At the top of the two chambers is a valve-chamber 5, containing a suitable valve and valve-actuating mechanism, a portion of which is connected to a bucket or weight 8, arranged one Within each chamber and serving when the water is discharged to act, through rods 9 and rocker-arms 10, to eifect initial movement of the valve-operating mechanism.

The valve and its operating mechanism are arranged within a suitable casing, including a number of superposed sections 12, 13, and 14 and a cylinder 15, all of these being rigidly bolted together in. order to form liquid-proof Y joints. The upper face of the section 14 is faced off to form a seat for a slide-valve 16, which controls the flow of air to the watercontaining chambers 1 and 2. Leading .to the valve-seat are three ports 18, 19, and 20,

the port 18 communicating, through suitable passages 21, with `the chamber 1*, While the port 20 communicates, through passages 22,. with the chamber 2. Theport 19 is an eX- haust-port and is in free communication with the atmosphere.

The slide-valve 1G is movable o-n its seat to alternately place the ports 18 and' 20 in communication with the interior of the cylinder 15, to which compressed air is supplied through a suitable port 23, and While one ciY the ports is thus sage of air under to one of the chambers the opposite port is placed in communication with the exhaust in order to allow the air from the second cham utilized to permit the pas-- pressure from the cylinder ber to readily escape as water enters said sec ond chamber. The opposite ends of the cylinder areprovidedwith suitable heads 24 25,.

and near the ends of the cylinder are suitable bushings 26 for the reception of a pair of pis-f tons 27 28, connected for mutual movement by a rod 29. The central portion of the rod IOC 29 has a iiange 30, that fits within a suitable recess formed in the top of the slide-valve 16, and said valve is held to its seat by means of springs 31, arranged between the upper portion of the valve and the rod 29.

The lower casing 12 is provided with a centrally-disposed vertically-extending block 34, in the lower portion of which is a bushing 35, arranged for the reception of a rock-shaft 36, and to the opposite ends of the rock-shaft are secured thc bucket-actuated rocker-arms 10. The top of this block is faced to form a seat for an auxiliary slide-valve 40, having a centrally-disposed recess 41, across which extends a pair of spaced rollers 42, that preferably are formed of tool-steel or other metal which will resist wear. Projecting into the recess 41 is a valve-actuating pin 45, the lower end of which is rigidly secured to the shaft 36, and each time the latter is rocked by the downward movement of one of the buckets and upward movement of the other bucket the movement will be transmitted by the arm 45 to the valve, and the latter will be shifted for the urpose of controlling the flow of a volume ofp compressed air or other Huid to one or other end of the cylinder 15-that is to say, between the pistons and heads of said cylinder with a view of shifting the position of the valve 16. The lower face of the valve 40 is provided with two ports 5() and 51, which control the flow of Huid from the interior of the chamber in which the valve is seated to the opposite ends of the cylinder 15 and between said cylinder 15 and an exhaustport 52.

In tracing the positions of the ports reference is had to Fig. 4, wherein the ports and assages are shown in diagrammatic form.

eading from the central portion of the cylinder 15, and therefore in constant communication with the compressed-air supply, is a port 54, which communicates with the interior of the valve-chamber, so that the latter receives a constant supply of compressed air. In the valve-seat are formed a number of vertically-disposed ports 55 56, which communicate, res Y ectively, through the passages 57 and 58 wit the mainexhaust 52. The valveseat is also provided with two sets of orts 59 60, that are arranged parallel with tfie ports 55 and 56, previously referred to. The several ports 59 communicate through a passage 61 with the inner face of the cylinder-head 24, so that if said ports 59 yare uncovered air will flow from the main cylinder4 15 through the passage 54 to the auxiliary-valve chamber, thence through ports 59, the passage 61, and act on the piston 27, or if the auxlliary valve is adjusted to the opposite position, or the position shown in Flg. 4, alr will pass through the ports and the port 63 to the cylinder-head 25 and will act on the piston. When either set of ports 59 and 60 is opened, the other set is placed in communication with.

the exhaust, as will be seen on reference to housing for the upper portion of the lower section 12 and also forms the upper wall of thc valve-chamber, so that if these parts are disconnected the valve may be readily removed for cleaning or rc airs.

Having thus describe the invention, what is claimed is- 1. In apparatus of the class described, a sectional ported casing, the up )er face of the lower section being faced to form a valveseat, and the opposite sides of said lower section being in communication with the waterchambers, ports 21, 22 leading from the valve seat to the opposite sides of the lower section, a slide-valve mounted on the seat and controlling the ports, a double cylinder formed in the upper section, a pair of pistons mounted in the cylinder, a rod connecting said pistons, said rod being connected to the valve, a rock-shaft in the lower portion of the lower section, oat or weight controlled arms secured to said shaft, a slide-valve operated from the rock-shaft, and ports arranged under the control of the slide-valve and serving for the admission and exhaust of air to the outer ends of said double cylinder.

2. In apparatus of the class described, a casing comprisin a lower section having a centrally-disposed vertically-extended portion, the upper face of which is faced to form a valve-seat, a detachable section forming a partial housing for the lower section and recessed to form a valve-receiving chamber, an air-port leading to the chamber, a air of sets of ports opening at opposite ends o the valveseat, a shde-valve mounted on the seat and provided with recesses or ports near its op osite ends, said valve being further provided with a central recess, Wear-pins on the side walls of said central recess, a rock-shaft carried by the lower section, means for operating the rock-shaft, and an arm extending from the rock-shaft and engaging said wearpms.

In testimony that we claim the foregoing as our own We have hereto aiiixed our signatures in the presence of two witnesses.

JOHN LEE LATTA. JAMES ANDREW MARTIN.

Iitnessest C. M. SHERRILL, A. A. WHITENER.

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